Here are some of the big moves and signings that have gone down over the last 36 hours or so in the NFC North.

Chicago Bears:
They signed  highly-discussed undrafted free agent Dane Sanzenbacher, WR, Ohio State.
They also are showing interest in WR/KR/Wildcat QB Brad Smith from the Jets.

Detroit Lions:
They're ready to release WR Bryant Johnson. That's the biggest story out of Detroit today. It was a rather quiet day for Lions news.
Oh wait. They're also signing K Dave Rayner. Yeah, the same Dave Rayner that kicked for Green Bay in 2006. Good luck with that.

Minnesota Vikings:
Reportedly agreed to a trade for Redskins' QB Donovan McNabb - pending restructuring of McNabb's contract
Agreed to a contract with former Bears WR Devin Aromashodu (who's in the running for best last name in the NFL). Ted Glover is very excited, as you can tell.
Former Vikes QB Tarvaris Jackson agreed to terms with the Seattle Seahawks.
And finally, Seattle's involved with another NFC North player, as they appear to be ready to drop some cash on Sidney Rice.

A list of notable undrafted free agent signings is coming up after the jump.

Chicago Bears:

Arizona WR Travis Cobb
Baylor CB Antareis Bryan
Boise State S Winston Venable
Nebraska G Ricky Henry
Northwestern DT Corbin Bryant
Notre Dame RB Robert Hughes
Oregon State C Alex Linnenkohl
Purdue TE Kyle Adams
TCU WR Jimmy Young
Virginia Tech TE Andre Smith

Detroit Lions:

Alabama H-Back Preston Dial
Central Michigan OL Jeff Maddux
Kent State LB Cobrani Mixon
Northwestern LB Quentin Davie
Purdue WR Keith Smith
Wisconsin-Stevens Point WR Jared Jenkins

Minnesota Vikings:

Arizona G Conan Amituanai
Auburn G Byron Ison
Iowa TE Allen Reisner
Kentucky RB Derrick Locke
Miami CB Ryan Hill
Ohio State CB Devon Torrence
South Carolina TE Ed Barham
Utah RB Matt Asiata